/* ═══════════════════════════════════════════════════════════════════════════
   Cartrack LTV Platform — Design System
   Aesthetic: Goldman Sachs institutional terminal
   ═══════════════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@300;400;500;600&family=Inter:wght@300;400;500;600&display=swap');

/* ── CSS Variables ─────────────────────────────────────────────────────────── */
:root {
  --bg-base:        #0a0e1a;
  --bg-panel:       #0f1629;
  --bg-panel-alt:   #111827;
  --bg-hover:       #1a2540;
  --border:         #1e2d4a;
  --border-light:   #253450;

  --gold:           #c9a84c;
  --gold-dim:       #9a7a35;
  --gold-bright:    #e8c56a;

  --text-primary:   #e8eaf0;
  --text-secondary: #8892a4;
  --text-dim:       #556070;

  --green:          #2ecc71;
  --green-dim:      #1a7a43;
  --red:            #e74c3c;
  --red-dim:        #8a2d24;
  --amber:          #f39c12;
  --amber-dim:      #916010;
  --blue:           #3498db;

  --font-mono:      'IBM Plex Mono', 'Courier New', monospace;
  --font-sans:      'Inter', -apple-system, sans-serif;

  --radius-sm:      2px;
  --radius-md:      4px;
  --transition:     0.15s ease;

  --nav-sidebar-w:           220px;
  --nav-sidebar-w-collapsed: 52px;
}

/* ── Reset & Base ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 13px; scroll-behavior: smooth; }

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Typography ────────────────────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h1 { font-size: 1.6rem; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1.0rem; }
h4 { font-size: 0.85rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.08em; }

.mono { font-family: var(--font-mono); }
.dim  { color: var(--text-secondary); }
.text-gold { color: var(--gold); }
.text-green { color: var(--green); }
.text-red { color: var(--red); }
.text-amber { color: var(--amber); }

/* ── Layout ────────────────────────────────────────────────────────────────── */
.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin-left: var(--nav-sidebar-w);
  transition: margin-left 0.2s;
}
.page-wrapper.sidebar-collapsed {
  margin-left: var(--nav-sidebar-w-collapsed);
}

.content-area {
  flex: 1;
  padding: 20px 24px;
  max-width: 1920px;
  margin: 0 auto;
  width: 100%;
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 16px; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }

@media (max-width: 1200px) {
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ── Top Navigation Bar ────────────────────────────────────────────────────── */
.topbar {
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 52px;
  display: flex;
  align-items: center;
  gap: 32px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar-brand {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.05em;
  text-decoration: none;
  white-space: nowrap;
}
.topbar-brand span { color: var(--text-secondary); font-weight: 300; }

.topbar-nav {
  display: flex;
  gap: 4px;
  flex: 1;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: var(--transition);
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.nav-link:hover { color: var(--text-primary); border-color: var(--border); }
.nav-link.active {
  color: var(--gold);
  border-color: var(--gold-dim);
  background: rgba(201, 168, 76, 0.06);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}

.last-updated {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
}

.refresh-btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gold);
  background: none;
  border: 1px solid var(--gold-dim);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}
.refresh-btn:hover { background: rgba(201, 168, 76, 0.1); }

/* ── Page Header ───────────────────────────────────────────────────────────── */
.page-header {
  padding: 20px 0 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.page-header h1 {
  font-size: 1.1rem;
  color: var(--text-primary);
}

.page-header h1 span {
  color: var(--text-secondary);
  font-weight: 300;
}

.page-badge {
  font-family: var(--font-mono);
  font-size: 0.70rem;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.badge-sales   { color: var(--blue);  border-color: var(--blue);  background: rgba(52,152,219,0.06); }
.badge-mgmt    { color: var(--gold);  border-color: var(--gold-dim); background: rgba(201,168,76,0.06); }
.badge-reten   { color: var(--amber); border-color: var(--amber-dim); background: rgba(243,156,18,0.06); }
.badge-gov     { color: var(--green); border-color: var(--green-dim); background: rgba(46,204,113,0.06); }

/* ── KPI Cards ─────────────────────────────────────────────────────────────── */
.kpi-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.kpi-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--gold);
  padding: 14px 16px;
  border-radius: var(--radius-md);
  position: relative;
}

.kpi-card.green-accent { border-left-color: var(--green); }
.kpi-card.red-accent   { border-left-color: var(--red); }
.kpi-card.amber-accent { border-left-color: var(--amber); }
.kpi-card.blue-accent  { border-left-color: var(--blue); }

.kpi-label {
  font-size: 0.68rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
  margin-bottom: 6px;
}

.kpi-value {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 4px;
}

.kpi-delta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  display: flex;
  align-items: center;
  gap: 4px;
}
.kpi-delta.up   { color: var(--green); }
.kpi-delta.down { color: var(--red); }
.kpi-delta.flat { color: var(--text-dim); }

.kpi-sub {
  font-size: 0.70rem;
  color: var(--text-dim);
  margin-top: 4px;
}

/* ── Panels ────────────────────────────────────────────────────────────────── */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.panel-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.panel-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-primary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.panel-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.panel-body {
  padding: 16px;
}

.panel-body.no-pad { padding: 0; }

/* ── Charts ────────────────────────────────────────────────────────────────── */
.chart-container {
  width: 100%;
  position: relative;
}

/* ── Tables ────────────────────────────────────────────────────────────────── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.80rem;
}

.data-table thead tr {
  border-bottom: 1px solid var(--border);
}

.data-table th {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 8px 12px;
  text-align: left;
  font-weight: 400;
  white-space: nowrap;
}

.data-table th.sortable { cursor: pointer; user-select: none; }
.data-table th.sortable:hover { color: var(--text-primary); }

.data-table td {
  padding: 9px 12px;
  color: var(--text-primary);
  border-bottom: 1px solid rgba(30, 45, 74, 0.5);
  white-space: nowrap;
}

.data-table tr:nth-child(even) td { background: rgba(17, 24, 39, 0.5); }
.data-table tr:hover td { background: var(--bg-hover); }

.data-table .mono-cell { font-family: var(--font-mono); }
.data-table .right-cell { text-align: right; }

/* ── Tier Badges ───────────────────────────────────────────────────────────── */
.tier-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
}
.tier-RED   { background: rgba(231,76,60,0.15);  color: var(--red);   border: 1px solid var(--red-dim); }
.tier-AMBER { background: rgba(243,156,18,0.15); color: var(--amber); border: 1px solid var(--amber-dim); }
.tier-GREEN { background: rgba(46,204,113,0.15); color: var(--green); border: 1px solid var(--green-dim); }
.tier-basic    { background: rgba(52,152,219,0.1); color: var(--blue); border: 1px solid rgba(52,152,219,0.3); }
.tier-standard { background: rgba(201,168,76,0.1); color: var(--gold); border: 1px solid var(--gold-dim); }
.tier-premium  { background: rgba(155,89,182,0.1); color: #bb8fce; border: 1px solid rgba(155,89,182,0.3); }
.tier-fleet    { background: rgba(46,204,113,0.1); color: var(--green); border: 1px solid var(--green-dim); }

/* ── Action Badges ─────────────────────────────────────────────────────────── */
.action-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.04em;
}
.action-continue  { background: rgba(46,204,113,0.1);  color: var(--green); border: 1px solid var(--green-dim); }
.action-cancel    { background: rgba(231,76,60,0.1);   color: var(--red);   border: 1px solid var(--red-dim); }
.action-retrieve  { background: rgba(243,156,18,0.1);  color: var(--amber); border: 1px solid var(--amber-dim); }

/* ── Status Dots ───────────────────────────────────────────────────────────── */
.status-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 6px;
}
.dot-green { background: var(--green); box-shadow: 0 0 6px var(--green); }
.dot-amber { background: var(--amber); box-shadow: 0 0 6px var(--amber); }
.dot-red   { background: var(--red);   box-shadow: 0 0 6px var(--red); }
.dot-dim   { background: var(--text-dim); }

/* ── Form Controls ─────────────────────────────────────────────────────────── */
.form-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: flex-end;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 140px;
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-control {
  background: var(--bg-base);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  outline: none;
  transition: var(--transition);
}
.form-control:focus { border-color: var(--gold-dim); }
.form-control option { background: var(--bg-panel); }

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid;
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.btn-gold {
  background: var(--gold);
  color: var(--bg-base);
  border-color: var(--gold);
  font-weight: 600;
}
.btn-gold:hover { background: var(--gold-bright); }

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn-outline:hover { color: var(--text-primary); border-color: var(--border-light); }

/* ── Pricing Decision Card ─────────────────────────────────────────────────── */
.pricing-result {
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-top: 16px;
}

.pricing-result.viable { border-color: var(--green-dim); }
.pricing-result.blocked { border-color: var(--red-dim); }

.pricing-verdict {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.verdict-proceed { color: var(--green); }
.verdict-block   { color: var(--red); }

.pricing-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.pricing-metric {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
}

.pricing-metric .label {
  font-size: 0.66rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: var(--font-mono);
  margin-bottom: 4px;
}

.pricing-metric .value {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ── Scrollbar ─────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

/* ── Skeleton loader ───────────────────────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--bg-panel) 25%, var(--bg-hover) 50%, var(--bg-panel) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ── Alert Banner ──────────────────────────────────────────────────────────── */
.alert-banner {
  padding: 10px 16px;
  border-left: 3px solid;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  margin-bottom: 16px;
}
.alert-banner.alert-red   { background: rgba(231,76,60,0.08);  border-color: var(--red);   color: var(--red); }
.alert-banner.alert-amber { background: rgba(243,156,18,0.08); border-color: var(--amber); color: var(--amber); }
.alert-banner.alert-green { background: rgba(46,204,113,0.08); border-color: var(--green); color: var(--green); }

/* ── Dividers ──────────────────────────────────────────────────────────────── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 20px 0;
}

/* ── Tooltip ───────────────────────────────────────────────────────────────── */
[data-tooltip] { position: relative; cursor: help; }
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-panel-alt);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.70rem;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s;
  z-index: 50;
  font-family: var(--font-sans);
}
[data-tooltip]:hover::after { opacity: 1; }

/* ── Progress Bar ──────────────────────────────────────────────────────────── */
.progress-bar-wrap {
  background: var(--bg-base);
  border-radius: 2px;
  height: 4px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  border-radius: 2px;
  background: var(--gold);
  transition: width 0.5s ease;
}
.fill-green { background: var(--green); }
.fill-red   { background: var(--red); }
.fill-amber { background: var(--amber); }

/* ── Table scroll wrapper ──────────────────────────────────────────────────── */
.table-scroll {
  overflow-x: auto;
  overflow-y: auto;
  max-height: 420px;
}

/* ── Section spacer ────────────────────────────────────────────────────────── */
.section-gap { margin-bottom: 20px; }

/* ── Loading overlay ───────────────────────────────────────────────────────── */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 14, 26, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  border-radius: var(--radius-md);
}
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Navigation Sidebar ─────────────────────────────────────────────────────── */
.nav-sidebar {
  position: fixed;
  left: 0; top: 0; bottom: 0;
  width: var(--nav-sidebar-w);
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 200;
  transition: width 0.2s;
  overflow: hidden;
}
.nav-sidebar.collapsed { width: var(--nav-sidebar-w-collapsed); }

.nav-sidebar-burger {
  height: 52px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  gap: 12px;
  flex-shrink: 0;
}
.nav-sidebar-brand {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.nav-sidebar-brand span { color: var(--text-secondary); font-weight: 400; }

.nav-sidebar-nav { flex: 1; overflow-y: auto; overflow-x: hidden; padding: 8px 0; }

.nav-sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.70rem;
  letter-spacing: 0.06em;
  white-space: nowrap;
  border-left: 2px solid transparent;
  transition: var(--transition);
}
.nav-sidebar-link:hover { color: var(--text-primary); background: var(--bg-hover); }
.nav-sidebar-link.active {
  color: var(--gold);
  border-left-color: var(--gold);
  background: rgba(201,168,76,0.06);
}
.nav-sidebar-label { transition: opacity 0.15s; }
.nav-sidebar.collapsed .nav-sidebar-label { opacity: 0; pointer-events: none; }
.nav-sidebar-icon { width: 18px; height: 18px; flex-shrink: 0; }

.nav-sidebar-bottom { border-top: 1px solid var(--border); padding: 6px 0; flex-shrink: 0; }

/* ── Sidebar sub-menu (USER MGMT expandable) ────────────────────────────────── */
.nav-sidebar-group { position: relative; }
.nav-sidebar-group > .nav-sidebar-link { position: relative; }
.nav-sidebar-chevron {
  width: 10px; height: 10px; flex-shrink: 0; margin-left: auto;
  transition: transform 0.2s;
}
.nav-sidebar-group.open > .nav-sidebar-link .nav-sidebar-chevron { transform: rotate(180deg); }
.nav-sidebar-submenu {
  display: none;
  padding: 2px 0 4px;
}
.nav-sidebar-group.open > .nav-sidebar-submenu { display: block; }
.nav-sidebar-sublink {
  display: block;
  padding: 5px 16px 5px 46px;
  font-family: var(--font-mono);
  font-size: 0.60rem;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.15s, background 0.15s;
  border-left: 2px solid transparent;
}
.nav-sidebar-sublink:hover { color: var(--text-primary); background: var(--bg-hover); }
.nav-sidebar-sublink.active { color: var(--gold); border-left-color: var(--gold); }
.collapsed .nav-sidebar-submenu { display: none !important; }
.collapsed .nav-sidebar-chevron { display: none; }

/* ── Theme toggle button (injected by initSidebar) ──────────────────────────── */
.nav-theme-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  width: 100%;
  background: none;
  border: none;
  border-left: 2px solid transparent;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.70rem;
  letter-spacing: 0.06em;
  white-space: nowrap;
  cursor: pointer;
  transition: var(--transition);
}
.nav-theme-btn:hover { color: var(--text-primary); background: var(--bg-hover); }

/* ── Light Mode ─────────────────────────────────────────────────────────────── */
/*
  html.light-mode has specificity 0-1-1, which beats every page's inline
  :root { } block at 0-1-0, so this single block themes the whole app.
*/
html.light-mode {
  /* ── Global design-system vars ── */
  --bg-base:        #f4f6f9;
  --bg-panel:       #ffffff;
  --bg-panel-alt:   #eef1f6;
  --bg-hover:       #e4e9f2;
  --border:         #c8d2e0;
  --border-light:   #dde4ed;

  --gold:           #7a5914;
  --gold-dim:       #9a7030;
  --gold-bright:    #5e4310;

  --text-primary:   #0d1117;
  --text-secondary: #4a5568;
  --text-dim:       #718096;

  --green:          #15803d;
  --green-dim:      #14532d;
  --red:            #b91c1c;
  --red-dim:        #991b1b;
  --amber:          #b45309;
  --amber-dim:      #92400e;
  --blue:           #1d4ed8;

  /* ── Page-local aliases (inline <style> :root blocks in each HTML page) ── */
  --bg:             #f4f6f9;
  --bg-card:        #ffffff;
  --border-s:       #dde4ed;
  --text:           #0d1117;
  --text-2:         #4a5568;
  --text-3:         #9aa5b4;
}

/* ═══════════════════════════════════════════════════════════════════════════
   Chat Widget — Floating LLM Assistant
   ═══════════════════════════════════════════════════════════════════════════ */

.chat-fab {
  position: fixed;
  bottom: 24px; right: 24px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--gold);
  color: var(--bg-base);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  z-index: 900;
  transition: transform 0.2s, background 0.2s;
}
.chat-fab:hover { transform: scale(1.08); }
.chat-fab.active { background: var(--text-dim); }

.chat-panel {
  position: fixed;
  bottom: 84px; right: 24px;
  width: 380px; height: 520px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: none;
  flex-direction: column;
  z-index: 901;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  overflow: hidden;
}
.chat-panel.open { display: flex; }

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  border-top: 2px solid var(--gold);
  flex-shrink: 0;
}
.chat-header-left { display: flex; align-items: center; gap: 8px; }
.chat-header-title {
  font-family: var(--font-mono);
  font-size: 0.60rem;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  text-transform: uppercase;
}
.chat-header-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-dim);
}
.chat-header-dot.online { background: var(--green); }
.chat-header-dot.warning { background: var(--amber); }
.chat-header-dot.offline { background: var(--red); }

.chat-close {
  background: transparent; border: none;
  color: var(--text-dim); font-size: 1.3rem;
  cursor: pointer; line-height: 1;
}
.chat-close:hover { color: var(--text-primary); }

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chat-msg {
  max-width: 88%;
}
.chat-msg.user { align-self: flex-end; }
.chat-msg.assistant { align-self: flex-start; }

.chat-msg-content {
  padding: 8px 12px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}
.chat-msg.user .chat-msg-content {
  background: rgba(201,168,76,0.12);
  color: var(--gold);
  border: 1px solid rgba(201,168,76,0.25);
}
.chat-msg.assistant .chat-msg-content {
  background: var(--bg-hover);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.chat-status-bar {
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: 0.60rem;
  color: var(--amber);
  background: rgba(243,156,18,0.06);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.chat-input-row {
  display: flex;
  gap: 6px;
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.chat-input {
  flex: 1;
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 8px 10px;
  outline: none;
}
.chat-input:focus { border-color: var(--gold-dim); }
.chat-send {
  background: rgba(201,168,76,0.12);
  border: 1px solid var(--gold-dim);
  border-radius: 4px;
  color: var(--gold);
  width: 34px; height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.chat-send:hover { background: rgba(201,168,76,0.2); }
.chat-send:disabled { opacity: 0.4; cursor: default; }

/* ── Session Warning Modal ─────────────────────────────────────────────────── */
#session-warning-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: sw-fade-in 0.2s ease;
}
@keyframes sw-fade-in { from { opacity: 0; } to { opacity: 1; } }

#session-warning-modal {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-top: 2px solid var(--amber);
  border-radius: var(--radius-md);
  padding: 32px 36px;
  width: 380px;
  max-width: 90vw;
  text-align: center;
}
.sw-icon {
  font-size: 2rem;
  margin-bottom: 12px;
  opacity: 0.8;
}
.sw-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--amber);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.sw-body {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
}
.sw-body strong {
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 1rem;
}
.sw-actions {
  display: flex;
  gap: 12px;
}
.sw-btn {
  flex: 1;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 11px 16px;
  cursor: pointer;
  transition: background var(--transition);
}
.sw-btn-primary {
  background: rgba(201, 168, 76, 0.15);
  border: 1px solid var(--gold-dim);
  color: var(--gold);
}
.sw-btn-primary:hover { background: rgba(201, 168, 76, 0.25); }
.sw-btn-secondary {
  background: rgba(136, 146, 164, 0.08);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}
.sw-btn-secondary:hover { background: rgba(136, 146, 164, 0.15); }
.sw-status {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-dim);
  margin-top: 12px;
  min-height: 1em;
}

/* Light mode overrides */
.light-mode #session-warning-overlay { background: rgba(0, 0, 0, 0.4); }
.light-mode #session-warning-modal { background: #fff; border-color: #d1d5db; }
.light-mode .sw-body { color: #4a5568; }
.light-mode .sw-btn-secondary { background: #f3f4f6; border-color: #d1d5db; color: #4a5568; }